NewSlcExecutionController.java

   1 /*
   2  * Copyright (C) 2010 Mathieu Baudier <mbaudier@argeo.org>
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *         http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 package org.argeo.slc.web.mvc.process;
  18
  19 import java.io.BufferedReader;
  20 import java.io.ByteArrayInputStream;
  21 import java.io.InputStream;
  22 import java.util.UUID;
  23
  24 import javax.servlet.http.HttpServletRequest;
  25 import javax.servlet.http.HttpServletResponse;
  26
  27 import org.apache.commons.io.IOUtils;
  28 import org.apache.commons.logging.Log;
  29 import org.apache.commons.logging.LogFactory;
  30 import org.argeo.slc.core.attachment.Attachment;
  31 import org.argeo.slc.core.attachment.AttachmentsStorage;
  32 import org.argeo.slc.core.attachment.SimpleAttachment;
  33 import org.argeo.slc.msg.MsgConstants;
  34 import org.argeo.slc.msg.ObjectList;
  35 import org.argeo.slc.process.SlcExecution;
  36 import org.argeo.slc.process.SlcExecutionStep;
  37 import org.argeo.slc.runtime.SlcAgent;
  38 import org.argeo.slc.runtime.SlcAgentFactory;
  39 import org.argeo.slc.services.SlcExecutionService;
  40 import org.argeo.slc.web.mvc.AbstractServiceController;
  41 import org.springframework.oxm.Marshaller;
  42 import org.springframework.oxm.Unmarshaller;
  43 import org.springframework.util.Assert;
  44 import org.springframework.web.servlet.ModelAndView;
  45 import org.springframework.xml.transform.StringResult;
  46 import org.springframework.xml.transform.StringSource;
  47
  48 /** Send a new SlcExecution. */
  49 public class NewSlcExecutionController extends AbstractServiceController {
  50         private final static Log log = LogFactory
  51                         .getLog(NewSlcExecutionController.class);
  52
  53         private SlcAgentFactory agentFactory;
  54         private Unmarshaller unmarshaller;
  55         private Marshaller marshaller;
  56         private SlcExecutionService slcExecutionService;
  57
  58         private AttachmentsStorage attachmentsStorage;
  59
  60         @Override
  61         protected void handleServiceRequest(HttpServletRequest request,
  62                         HttpServletResponse response, ModelAndView modelAndView)
  63                         throws Exception {
  64
  65                 if (log.isTraceEnabled()) {
  66                         log.debug("Content-Type: " + request.getContentType());
  67                         log.debug("Content-Length: " + request.getContentLength());
  68                 }
  69
  70                 String agentId = request
  71                                 .getParameter(MsgConstants.PROPERTY_SLC_AGENT_ID);
  72                 Assert.notNull(agentId, "agent id");
  73
  74                 String answer = request.getParameter("body");
  75                 if (answer == null) {
  76                         // lets read the message body instead
  77                         BufferedReader reader = request.getReader();
  78                         StringBuffer buffer = new StringBuffer();
  79                         String line = null;
  80                         while (((line = reader.readLine()) != null)) {
  81                                 buffer.append(line);
  82                         }
  83                         answer = buffer.toString();
  84                 }
  85
  86                 if (log.isTraceEnabled())
  87                         log.debug("Received message:\n" + answer);
  88
  89                 StringSource source = new StringSource(answer);
  90                 SlcExecution slcExecution = (SlcExecution) unmarshaller
  91                                 .unmarshal(source);
  92
  93                 // Workaround for https://www.argeo.org/bugzilla/show_bug.cgi?id=86
  94                 if (slcExecution.getUuid() == null
  95                                 || slcExecution.getUuid().length() < 8)
  96                         slcExecution.setUuid(UUID.randomUUID().toString());
  97
  98                 slcExecution.setStatus(SlcExecution.STATUS_SCHEDULED);
  99                 slcExecution.getSteps().add(
 100                                 new SlcExecutionStep(SlcExecutionStep.TYPE_START,
 101                                                 "Process started from the Web UI"));
 102
 103                 // ObjectList ol = new ObjectList(slcExecution.getRealizedFlows());
 104                 // StringResult result = new StringResult();
 105                 // marshaller.marshal(ol, result);
 106                 // slcExecution.setRealizedFlowsXml(result.toString());
 107                 storeRealizedFlows(slcExecution);
 108
 109                 slcExecutionService.newExecution(slcExecution);
 110
 111                 SlcAgent agent = agentFactory.getAgent(agentId);
 112                 agent.runSlcExecution(slcExecution);
 113         }
 114
 115         protected void storeRealizedFlows(SlcExecution slcExecution) {
 116                 Attachment attachment = realizedFlowsAttachment(UUID.randomUUID()
 117                                 .toString(), slcExecution);
 118                 InputStream in = null;
 119                 try {
 120
 121                         ObjectList ol = new ObjectList(slcExecution.getRealizedFlows());
 122                         StringResult result = new StringResult();
 123                         marshaller.marshal(ol, result);
 124
 125                         in = new ByteArrayInputStream(result.toString().getBytes());
 126                         attachmentsStorage.storeAttachment(attachment, in);
 127
 128                         slcExecution.setRealizedFlowsXml(attachment.getUuid());
 129
 130                 } catch (Exception e) {
 131                         log.error("Could not store realized flows as attachment #"
 132                                         + attachment.getUuid(), e);
 133                 } finally {
 134                         IOUtils.closeQuietly(in);
 135                 }
 136         }
 137
 138         public void setUnmarshaller(Unmarshaller unmarshaller) {
 139                 this.unmarshaller = unmarshaller;
 140         }
 141
 142         public void setAgentFactory(SlcAgentFactory agentFactory) {
 143                 this.agentFactory = agentFactory;
 144         }
 145
 146         public void setSlcExecutionService(SlcExecutionService slcExecutionService) {
 147                 this.slcExecutionService = slcExecutionService;
 148         }
 149
 150         public void setMarshaller(Marshaller marshaller) {
 151                 this.marshaller = marshaller;
 152         }
 153
 154         public void setAttachmentsStorage(AttachmentsStorage attachmentsStorage) {
 155                 this.attachmentsStorage = attachmentsStorage;
 156         }
 157
 158         /** Unify labelling in the package */
 159         static Attachment realizedFlowsAttachment(String attachmentUuid,
 160                         SlcExecution slcExecution) {
 161                 return new SimpleAttachment(attachmentUuid,
 162                                 "RealizedFlows of SlcExecution #" + slcExecution.getUuid(),
 163                                 "text/xml");
 164         }
 165 }